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[Vasya Pupkin <1461950@xxxxxxxxxxxxxxxxxx>]

So just in case, yes, the problem is reproducible with latest BIOS
version and comment #12 is made with the latest BIOS installed.

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https://bugs.launchpad.net/bugs/1461950

Title:
  Support for Ambient Light Sensor in ASUS Zenbook UX301LAA

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  On a wiki page related to ASUS Zenbook
  (https://help.ubuntu.com/community/AsusZenbookPrime) there is a note
  about Ambient Light Sensor:

  ===
  Ambient light sensor: They keycode to use is 248, that is "fn"+"A", the icon on the "A" is a sensor with lightrays and the text auto. Doesn't work by default, because a driver exists but it's not included in kernel source. Need testing. Bug is reported. You can, however, use an external application to make it work: https://github.com/danieleds/Asus-Zenbook-Ambient-Light-Sensor-Controller.
  ===

  According to referenced bug report
  (https://bugzilla.kernel.org/show_bug.cgi?id=70421), the bug is fixed
  long time ago. Can we have this sensor supported at last?

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic (not installed)
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC1D0p:   shadowlmd   2252 F...m pulseaudio
   /dev/snd/controlC1:  shadowlmd   2252 F.... pulseaudio
  CRDA:
   country EU: DFS-UNSET
   	(2402 - 2482 @ 40), (N/A, 20), (N/A)
   	(5170 - 5250 @ 40), (N/A, 20), (N/A)
   	(5250 - 5330 @ 40), (N/A, 20), (0 ms), DFS
   	(5490 - 5710 @ 40), (N/A, 27), (0 ms), DFS
  CurrentDesktop: Unity
  Date: Thu Jun  4 16:21:13 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=4faf8732-5100-4612-80b9-4d6f4fb8b384
  InstallationDate: Installed on 2015-05-06 (28 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: ASUSTeK COMPUTER INC. UX301LAA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic.efi.signed root=UUID=b9c815db-e4fe-4e08-8d62-0c68991fa8be ro quiet splash rootfstype=ext4 pcie_aspm=force acpi_osi= vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-18-generic N/A
   linux-backports-modules-3.19.0-18-generic  N/A
   linux-firmware                             1.143.1
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/08/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX301LAA.209
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX301LAA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX301LAA.209:bd05/08/2014:svnASUSTeKCOMPUTERINC.:pnUX301LAA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX301LAA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX301LAA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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